For centuries shiitake has been known as the medicinal mushroom.Mushrooms 4 Life\'s Organic Shiitake mushrooms supplement carefully combines the best of Shiitake for optimal benefits. 90% = Full-spectrum biomass of mycelium and young fruiting bodies grown on organic  brown rice under nature-identical conditions to provide a  higher yield of a wide range of key active nutrients. 10% = Hot water extraction of the mature fruiting body to provide a superior level of bio-available beta glucans and more specific nutrients. Shiitake ‘The Fragrant Mushroom’ is used traditionally for a wide range of health conditions.